"The controversy over Toyota, Williams and Brawn GP’s rear diffuser arrangements is dragging on and is unlikely to be settled until the first race on 29 March, Forumula1.net understands. The three teams have innovative designs for their rear diffusers, which rival teams accuse of breaching the maximum height allowed for the structure. But the legality or otherwise of the design will not be confirmed until Melbourne, when the first official protest may be lodged by other teams."